Differenze tra le versioni di "File:SheafferPressureBar.jpg"

Informazioni

<multilang> @it|Schema di un caricamento a levetta e relativo meccanismo della barra di pressione della Sheaffer. Estratto dalla prima pagina del brevetto originale (nº US-1852094 ). Ritoccato dall'autore per una maggiore nitidezza. @en|Schema of a Sheaffer lever filler system, with its peculiar pressure bar mechanism. Excerpt from original patent (nº US-1852094 ) first page. Retouched by the author for a better sharpness. </multilang>

Licenza

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